qcow2: Allow different cluster sizes
Add an option to specify the cluster size of a newly created qcow2 image.
Default is 4k which is the same value that was hard-coded before.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/block_int.h b/block_int.h
index 782de6c..0820ed1 100644
--- a/block_int.h
+++ b/block_int.h
@@ -36,6 +36,7 @@
#define BLOCK_OPT_COMPAT6 "compat6"
#define BLOCK_OPT_BACKING_FILE "backing_file"
#define BLOCK_OPT_BACKING_FMT "backing_fmt"
+#define BLOCK_OPT_CLUSTER_SIZE "cluster_size"
typedef struct AIOPool {
void (*cancel)(BlockDriverAIOCB *acb);